it is recommended that you leave the pad on for 24 hours

with little backpressure

Other air purifiers on the market have a carbon blanket on the outside of a HEPA filter

The HEPA filter allows this EnviroCare product to capture 99

9% effective at capturing particles like pollen

Hoover T-Series WindTunnel Vacuum Exhaust Hepa Filter, #303172001 Air Purifiers it is recommended that you[custom_html] The genuine Hoover Exhaust HEPA Filter is compatible with the following Hoover model vacuum cleaners: UH70110: T Series WindTunnel Rewind Bagless Upright UH70105: T Series WindTunnel Bagless Upright UH70205: T Series WindTunnel Rewind Plus Bagless Upright UH70210: T Series WindTunnel Pet Rewind Bagless Upright UH70100: T Series WindTunnel Pet Bagless Upright UH70115: WindTunnel T Series WindTunnel Bagless Upright UH70120: T Series